| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <mutex> |
| |
| // template <class Mutex> class unique_lock; |
| |
| // template <class Clock, class Duration> |
| // bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time); |
| |
| #include <mutex> |
| #include <cassert> |
| |
| bool try_lock_until_called = false; |
| |
| struct mutex |
| { |
| template <class Clock, class Duration> |
| bool try_lock_until(const std::chrono::time_point<Clock, Duration>& abs_time) |
| { |
| typedef std::chrono::milliseconds ms; |
| assert(Clock::now() - abs_time < ms(5)); |
| try_lock_until_called = !try_lock_until_called; |
| return try_lock_until_called; |
| } |
| void unlock() {} |
| }; |
| |
| mutex m; |
| |
| int main() |
| { |
| typedef std::chrono::steady_clock Clock; |
| std::unique_lock<mutex> lk(m, std::defer_lock); |
| assert(lk.try_lock_until(Clock::now()) == true); |
| assert(try_lock_until_called == true); |
| assert(lk.owns_lock() == true); |
| try |
| { |
| lk.try_lock_until(Clock::now()); |
| assert(false); |
| } |
| catch (std::system_error& e) |
| { |
| assert(e.code().value() == EDEADLK); |
| } |
| lk.unlock(); |
| assert(lk.try_lock_until(Clock::now()) == false); |
| assert(try_lock_until_called == false); |
| assert(lk.owns_lock() == false); |
| lk.release(); |
| try |
| { |
| lk.try_lock_until(Clock::now()); |
| assert(false); |
| } |
| catch (std::system_error& e) |
| { |
| assert(e.code().value() == EPERM); |
| } |
| } |